GPU Pro 6

96 II Rendering

#d e f i n e THREAD GROUP SIZE 64

RWStructuredBuffer<uint> QuantizedLODDistance : register( u6 );

RWStructuredBuffer<uint> LODSortedStrandIndex : register( u7 );

// cameraPos , cameraDir , and maxDist are given through

// const buffer .

[ numthreads ( THREAD_GROUP_SIZE ,1,1)]

void ComputeCameraDistance ( uint GIndex : SV_GroupIndex ,

uint3 GId : SV_GroupID ,

uint3 DTid : SV_DispatchThreadID )

{

uint globalBladedIndex , globalRootVertexIndex ;

// Calculate indices above here .

float4 pos = g_HairVertexPositions [ globalRootVertexIndex +1];

float dist = dot (( pos . xyz − cameraPos . xyz), cameraDir . xyz );

// Perform frustum culling and ass ...